Diamond-tool.



1,299,619 I PathtedApr. 8,1919.

J. S. ROSE.

DIAMOND TOOL.

APPLICATION FIXED DEC. H 1918-- JIM/l,

QM/12 N 8 x 5 INVENTOI? A ITO/MEI JOSEPH S. ROSE, OF FORT CHESTER, NEW YORK.

DIAMOND-TOOL.

Application filed December 11, 1918. Serial No. 266,292.

To all whom it may concern:

Be it known that I, J osEPH S. ROSE, a citizen of the United States, residing in the village of Port Chester, Westchester county, and State of New York, have invented a new and useful Improvement in Diamond-Tools,

of which the following is a specification.

The invention is concerned with the setting and holding of diamonds and jewels for industrial purposes. Various methods have been employed for setting the stones of diamond tools, such as are used for truing and shaping emery wheels. One mode is to form a cavity ina solid holder, and after placing the diamond therein, to peen or calk the metal around it, .butit is diflicult in this way to make the stone-secure, because of its irregularlty, the operation being one whlch is more suitable for ound or circular shapes.

Holding the. diamondsby brazing or soldering islikely. to fail to cause the brazing material .to'come into close contact with the stone, so thatin use it'isapt to loosen; and

the high temperature necessary to melt thematerial tends to carbonize or injure the surfaces of the-stone, .with the result that after repeated settings it loses its characteristic and useful hardness. Even more injurious, for thesame reason, is the embedding ofthestone in a steel or other metal body or carrier while molten, the stone being positioned in-a mold and the hot fluid metal cast around it.- Furthermore, the resulting casting requires a substantial amount of machining to expose the point of the stone and to give the body the proper shape for use. Thus, while this method produces a complete rigid matrix-around the stone, it is expensive, and the contraction of the metal on coolingis so great that it often' checks the stone; in addition to which, as in-,

dicated, there is the drawback of softening matrix without injurious heat or contraction, capable when hard of holding the dia- Specification of Letters Patent.

Patented Apr. 8, 1919.

mond under the exacting conditions of use. The'matrix is inclosed by a protecting thinwalled cap of steel or the-like, having an ori fice of appropriate size and'shape to expose the point, the cap and matrix being placed in' a collar or socket having an internal flange or shoulder and clamped therein by the aid of a plug and screw. Pressure exerted upon the matrix by a screw or plunger while still plastic and confined with the stone, either in a tool constituted as described, or in a special press, condenses the'material and f causes it to become a solid mass, hard and enduring. Various hardening plastic matemale and compositions, jacketed as described,

may be used for the matrix, metallic alloys, such as dentists amalgam,being particuwt larly suitable. I

In the accompanying drawings forming a part hereof:

Figure I is a side elevation of a diamon d tool embodying the invention;

Fig. 2 is a front endview thereof;

.Fig. 3 is an enlarged longitudinal sec-' part ofthe tool tional view of the forward of Fig. 1; Fig. 4 is a side elevation partly broken away of the jacketed-matrix and stone;

Fig. 5 is a longitudinal section through another form of the diamond tool;

Fig. 6 is. a front end view illustrating a different form of diamond point and opening; and

Fig. 7 is an axial section through a wire 'drawingdie embodying the invention.

1 designates the diamond, 2 the hardened amalgam matrix, v3 athin-walled conoavoconvex, steel cap .having an opening 4 through which the point projects, 5 the collar or socket having an internal front flange 6 and internal screw-threads 7, and 8 the 1 plug. or. internal member having screwthreads 9 cooperative'with-the threads 7 to hold the parts'in rigidassembly, and, if so employed, to condense the matrix while set- The cap is preferably enlargedat-the base to form a basal shoulder. 10, which bears against the flange or shoulder of the socket. In 3 the-forwardend; of the plug is ting,- the whole constituting a-diamond tool."

represented as recessed and provided with an annular rim .1-1 fitting -within the rear projection of thefcap. Fig. 5-shows a fiatend plug 8 bearing upon a"fl'a t rear faceof the matrix.

The amalgam is molded around the stone:

" cap. As stated, the tool may be used press for this plug 8 with long socket tending rearward from the plug, but the invention may be embodied in various other forms of tools, as, for example, the short 5 of Fig. 5. The size and shape of the orifice in the cap will be determined by the size and shape of the point of the diamond and the work to be performed. Fig. 2 shows a circular opening, and Fig. 6 'an elliptical one 4, the cap in this instan e being designated 3. The

body. of the tool or setting can be used with stones and matrices of various sizes and shapes, the'expense of the cap, which requires to be changed, being very small. Furthermore, by applying the collar or socket to various styles of plugs, the tool can be adapted to various types of machines.

As the diamond, except for the point exposed, is completely surrounded and intimately engaged by a hard matrix, which in .turn is 1acketed, the stone is at all times reliably held; and the means employed to secure this result is such that no injury is donejto the stone in the production of the setting or subsequently, and the stone can.

.bodying the-invention,

be readily. removed will its matrix and used interchangeably, or can be easily freed from the matrix and reeinbedded when necessary.

With variation, in the sizes and shapes of the matrices, caps, sockets and plugs, numerous other specific tools, settings, instruments, and parts of apparatus, as, for example, cupped jewels for electrical meters, dies for drawing wire, glass-cutting tools, etching tools, etc., can be produced. Thus, Fig. 7 illustrates a wire-drawing die emthe same comprising 5", a matrix 2 to, an apertured diamond 1", a cap a socket referred 5" having an opening 49 with funnel enwhich in this instance to permit the passage trance, and 8 a plug, is open at-the center of the character of the wire, the relations being the same as in the other cases, naturally does not project.

What is claimed as new is: 1. An industrial stone setting, comprising a plug and socket, in combination with a removable thin metal cap clamped thereby and having an orifice, a matrix of compressed, amalgam jacketed by the cap, and a stone embedded in the matrix. 2; A setting for an industrial stone, comprising a'm atrix wherein the stone is embedded, and an apertured cap filled by the matrix, combined with a socket having an to enter the socket to force the cap and contents against the flange. 7

internal flange to retain the cap, and a Jos-EPH sf Ross.

except that the diamond 

